146 Botanisches Centralblatt. 



Tison, A. 1912. Sur la persistance de la nervation dichotomique 

 chez les Coniferes. (Bull. Soc. Linn. Normandie 6. IV. p. 30—46. 2 pl.) 



III. Biologie. 



Brotherus, V. F. 1911. Pflanzenphänologische Beobachtungen in 

 Finland 1907. (Bidrag tili Kännedom af Finlands Natur och Folk. 

 H. 71. N°. 1. 44 pp.) 



Fisher, M. JL. 1911. Report on com pollination. IL (Proc. Indiana 

 Ac. Sc. 1910 [1911]. p. 245.) 



Kawamura, L. 1912. Supplements to "On the cause of the flowe- 

 ring of bamboes". (Bot. Mag. Tokyo. XXVI. p. (66)— (68). Japanese.) 



Lewis, C. I. and C. C. Vincent. 1909. Pollination of the apple. 

 (Bull. Oregon Agr. Coli. Exp. Stat. 1909. 104.) 



Möller, A. 1911. Lebenszähigkeit von Pflanzen. (Die Umschau. 1911. 

 p. 476—477. ill.) 



Pammel, L. H. and C. M. King. 1911. Pollination of clover. (Proc. 

 Iowa Ac. Sc. XVIII. p. 35-45. ill.) 



Peabody, J. E. and A. E. Hunt. 1912. Elementary Plant Bioloay. 

 (London 1912. 8°. ill.) 



Ruhland, W. 1912. Die Plasmahaut als Ultrafilter bei der Kolloid- 

 aufnahme. [V. M.]. (Ber. deutsch, bot. Ges. XXX. p. 139—141.) 



Salisbury, E. J. 1912. Polymorphism in the flower of Silene ma- 

 ritima. (N. Phytologist. 1912. p. 7—12. 1 pl. 4 fig.) 



Stevens, N. E. 1912. Observations on heterostylous plants. (Bot. 

 Gaz. LIII. p. 277—308. 3 pl.) 



Weinkauff. 1912. Sommerhochwasser am Rhein im Jahre 1910. 

 (Natw. Zschr. Forst- u. Landw. X. p. 294.) 



IV. Morphologie, Teratologie, Befruchtung, Cytologie. 



Aisberg, C. L. 1912. Mechanisms of cell activity. (Science. 2. 



XXXIV. p. 97—105.) 

 Helten, W. M. v. 1912. Een tweeling klapper (Cocos nucifera). 



(Teysmannia. XXIII. p. 100—101.) 

 Jacob de Cordemoy, H. 1911. Contribution ä l'etude de la struc- 



ture du fruit et de la graine des Clusiacees. (Ann. Mus. col. Mar- 

 seille. XIX. p. 1—22.) 

 Kajanus, B. 1912. Ueber Verbänderung bei Beta vulgaris (L.). 



(Bot. Not. 1912. p. 145-147.) 

 Knupp, N. D. 1911. The flowers of Myriophyllum spicatum. (Proc. 



Iowa Ac. Sc. XVIII. p. 61-73. 4 pl.) 

 Litarniere, R. de 1912. Les phenomenes de la cinese somatique 



dans le meristeme radiculaire de quelques Polvpodiacees. (C. R. 



Ac. Sc. Paris. CLIV. p. 1097—1100.) 

 Markle, M. S. 1911. Two pine gametophytes in one ovule. (Proc. 



Indiana Ac. Sc. 1910 [1911]. p. 321. 1 pl.) 

 Nawaschin, L. 1911. Näheres über die Bildung der Spermakerne 



bei Lilium Martagon. (Mem. Soc. Nat. Kieff. XXI. p. 119— 152. 2 Taf.) 

 Newlon, L. M. 1911. Conditions which affect the branching of roots. 



(Rep. Michigan Ac. Sc. XIII. p. 200.) 

 Pearson, H. H. W. 1912. On the microsporangium and microspore 



of Gnetum with some notes on the structure of the inflorescence. 



(Ann. of Bot. XXVI. p. 603—620. 6 fig. 2 pl.) 

 Penau, H. 1912. Contribution ä la Cytologie de quelques micro- 



organismes [fin]. (Rev. gen. Bot. XXIV. p. 149—174. 2 pl.) 

 Price, S. R. 1912. Some observations with dark-ground illumination 



on plant cells. (Proc. Cambridge philos. Soc. XVI. p. 481 — 485.) 



